Chainrings, 50/34 to 52/34 ?

PLuKE

Hi guys.

Currently running 10apeed Tiagra compact 50/34.

I have been looking at replacing the outer chainring for an FSA 52T.

Will this be ok? Or will it be to tall?

Thanks

tincaman

16T max at the front ring on a compact, it wont work well/at all any more than that. You could do 36/52 though

PLuKE

Thanks.

All gets confusing when reading bits online.

Will stick to 50/34 then.

Thanks!
Luke

StillGoing

Why do you want a 52 outer but still want a 34 inner? Unless you're constantly spinning out on a 50 outer, I can't fathom the logic of changing when the speed advantage is just over 1mph at a cadence of 100rpm in the 12 cog. Let's imagine you regularly spin at 120rpm in the 12, the speed difference is 1.6mph. You could make that up spinning a couple of rpm harder. If you like the comfort of the 34 for hills, I'd stick with the 50 otherwise you'll need a 36 to go with the 52, plus a bigger cassette if you do want to keep the 34 for hills.

http://www.machars.net/bikecalc.htm